Laboratory mixer



FIG. 1 is a top front left perspective view of a laboratory mixer showing our new design;

FIG. 2 is a rear bottom right view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top front left perspective view of the design shown in an open configuration; and,

FIG. 8 is a top front right perspective view thereof.

The broken lines are included for the purpose of illustrating portions of the laboratory mixer that form no part of the claimed design.

The logo in FIGS. 1,2,5,7 and 8 forming part of the disclosure is an unregistered trademark of Precision NanoSystems Inc, of 655 West Kent Avenue N, Suite 50, Vancouver, Canada. 

CLAIM The ornamental design for a laboratory mixer, as shown and described. 